What to check before buying interactive displays for your school

The classroom before the model

Some of the differences between two interactive display proposals lie in the technical specifications, but others depend on things that rarely appear on the first page of a quote: the right size for the classroom, the writing quality, updates to the built-in system, the mount, the warranty or the service the school will receive when a display stops working.

At PenwinEdu we have been installing audiovisual equipment in schools for years, and there is something we see often: a display should not be chosen just by comparing models; first you need to understand the classroom where it will be used. A good purchase starts by measuring distances and looking at how teachers work, which devices the school uses and what infrastructure is already there. It is much easier to make a good decision before installing forty displays than to put right a choice once it has been repeated in forty classrooms.

Size should be chosen with the back of the classroom in mind

The first decision is usually size, and it is also one of the most important. A display can look huge when you see it from two metres away at a trade show and turn out too small when it is installed in a long classroom with pupils sitting six or seven metres away. So the criterion should not be which size ‘looks right’, but from what distance the content will have to be read.

When a display is too small, it is not always recognised straight away as a size problem. What usually happens is that the teacher ends up zooming in, enlarging documents or showing less information at a time so that it can be read from the back. You can work like that, but part of the display's usable area is being wasted. And unlike other adjustments, correcting a size mistake later means physically replacing the panel.

For this reason, when we plan the equipment for a set of classrooms at PenwinEdu, we do not assume they all need exactly the same size. You have to check the dimensions of the rooms, the position of the display and the viewing distance. The iiyama education range, which we usually work with, covers 55 to 98 inches, so the solution can be adapted to very different spaces, and the manufacturer also publishes a room simulator to estimate the size based on distance.

The fact that they are all 4K does not mean they all look the same

4K UHD resolution, 3840 × 2160 pixels in 16:9 format, has become practically standard in this type of display. It is an important figure, but it is usually no longer enough to tell two proposals apart. Once we know that both are 4K, we need to look at how the image will actually perform in the classroom.

Brightness and contrast matter especially in classrooms with large windows or a lot of natural light. The data sheets for the iiyama education range state values of between 500 and 550 cd/m² and a static contrast ratio of 1200:1. There is also something fairly simple to remember: a 4K display can only show a 4K signal if the device and the connection sending it the image are capable of delivering one. An old laptop, a poor cable or a source set to 1080p will make the display work at that resolution even if the panel could offer more.

This matters when whole classrooms are being refitted. It is not enough to check the panel's specifications in isolation; you also need to review which computers teachers will use and how they will connect. The digital classroom works as a whole, and its performance depends on all its parts being well planned.

A touch display also has to be comfortable to write on

Data sheets talk about simultaneous touch points and simultaneous writing points, but these are two different figures. A display can recognise many hands at once and yet allow fewer people to write at the same time. A 55-inch model in the TE13A series states 40 touch points and 10 writing points, while a 65-inch model in the TE15A series states 40 touch points and 32 writing points. And the figure depends on the system used to measure it: on that 55-inch model, the 10 writing points are what you get when a computer is connected, whereas with the built-in Android all 40 touch points can be used. That is why you should always ask which configuration each number was obtained with, or you will be comparing two data sheets that do not measure the same thing.

Many schools will not need thirty pupils to write at the same time. What matters is understanding what the figure really represents and checking that it matches how the display will be used in the classroom. If the display will usually be used by two or three pupils working together, what counts most is the writing quality, the precision and the responsiveness of the panel.

There are also details that make a big difference to everyday use and are sometimes overlooked when comparing quotes. These models support writing with a finger, with a passive pen, which needs no batteries or pairing, and with a gloved hand, and they include palm rejection so that you can rest your hand on the screen while writing without leaving stray marks. The data sheets also state a scan rate of 200 Hz and an accuracy of ±1 mm. On paper these look like very technical figures, but in the classroom they translate into something much easier to understand: writing on the display feels natural and the line appears where the user expects it.

The glass matters more in a school than it seems

A display installed in a classroom is exposed to very different use from a monitor in a meeting room. Over the years hundreds of pupils will pass in front of it, it will be written on every day and it will inevitably take the odd knock. That is why you also need to look at the physical characteristics of the glass.

Data sheets state thickness and hardness: 3.2 mm and 7H on the models in the education range. Ask for that figure in writing, because it is where an office panel installed in a school gives itself away. Depending on the series, they may also include an anti-glare coating, anti-reflective treatments, an antibacterial coating and lamination systems such as Optical Bonding or Zero-Gap Air Bonding. This last feature reduces the physical gap between the glass and the panel, cutting down what is known as parallax: the feeling that you put the pen down at one point but the line appears slightly offset.

These are details that can go unnoticed in a short demonstration, but they become important when a teacher uses the display for several hours a day over many school years. That is why we prefer to assess a display as a long-term working tool and not just by the impression it makes in the first few minutes of a sales presentation.

The display can last many years; the operating system ages sooner

This is one of the issues most often forgotten before buying. An interactive display can keep working perfectly for many years, while the built-in Android can become outdated much sooner. For its large-format displays, iiyama recommends not exceeding 18 hours of operation a day, a margin well above a classroom's actual use, so it is perfectly reasonable to expect a panel installed today to still be working several school years from now.

So, when assessing the built-in Android, the current version matters as much as the update policy the device will have, and whether there is a published schedule or just a promise made in a meeting. The current models in the range use iiWare 21E on Android 14 and announce an update to Android 16 for the fourth quarter of 2026. There are also alternatives for schools that prefer not to depend on the built-in operating system alone: a removable OPS module, which iiyama offers with Windows 11 IoT Enterprise, or the TN05 series, with no built-in operating system, to run the display from the school's own device fleet.

The choice depends on each school's approach. Some want the display to be usable on its own without connecting any computer; others prefer the teacher's laptop to remain the centre of their work. Both options are valid. What matters is deciding beforehand, rather than finding out later that you have paid for features that are hardly used or that precisely what teachers need is missing.

How teachers connect matters every day

A display can have plenty of connections and still be awkward to use. The practical question is much simpler: what will a teacher have to do on arriving in the classroom, in the minute between two lessons, to start working?

If the school uses laptops, a USB-C connection that carries video, data, touch control and power makes installation much simpler. On these models it can deliver up to 100 W, so a single cable lets you show the laptop's image on the display, use touch control and, with certain devices, charge the computer at the same time. This cuts down on adapters, cables and small problems which, multiplied across many classrooms and every day of the school year, end up taking a fair amount of time. If teachers present from a mobile phone or a tablet, what matters is wireless screen sharing and which systems it works with.

You also need to consider integration with the platforms the school already uses. These models have Google EDLA certification, the enterprise licence that gives access to Google apps and accounts directly from the panel, and the manufacturer states compatibility with Microsoft 365. If the school uses individual accounts for teachers, you also need to confirm that sign-in works with the teacher's own account and not with a generic classroom account, and to set up sign-out properly so that no personal information or open documents are left on a shared display.

Installation is part of the purchase

A 65-inch interactive display can weigh more than 40 kilos, so the mount and the wall it goes on are not a secondary issue. According to the data sheets, a 55-inch model weighs 28.7 kg and a 65-inch one reaches 43.5 kg, which rules out certain unreinforced partition walls. Nor is there a single VESA size: it changes with the display size, 400 × 400 mm on one model and 600 × 400 on another, so the mount that worked in one classroom may not work in the next. Before installing, you need to check the type of wall, choose the right mount and decide the actual working height.

Height is particularly important in early years (Infantil, ages 0–6) and primary (ages 6–12). A display installed with an adult's comfort alone in mind leaves the lower half out of the pupils' reach, which is exactly where they write. Depending on the project, fixed mounts, height-adjustable electric systems or mobile trolleys can be used. It is not just a mounting decision: it depends on how the display is going to be used in the classroom, and it is an educational decision before it is a technical one.

Then there are the two issues that hold up the most installations, which are much simpler and need checking before the quote is finalised: where the power socket is and where the network point is. These panels use a wired network connection and draw more than a hundred watts, so you need a power socket and a data point where the display goes, not four metres away. If power and data have to be run to the location of the new display, that work should be part of the project from the start: finding out when the panels have already arrived at the school only delays the installation and creates costs that could have been foreseen.

The warranty matters, but the service behind it matters even more

When a display breaks down in a classroom, the difference between a good and a bad experience is not just whether the product has a warranty. What matters is what you have to do to claim under it. Taking down a panel weighing over forty kilos, packing it, sending it to a repair centre and reinstalling it is nothing like having support or a replacement on site at the school.

iiyama offers a five-year warranty with on-site exchange on certain education products, subject to the conditions that apply to the product and the country concerned. Ask for that small print in writing for the specific model, because it is stated product by product.

But even with a good warranty, there is another fundamental part: who diagnoses the fault, who handles the issue with the manufacturer and who makes sure the classroom is back up and running, including taking the panel down and putting it back up. The warranty protects the investment in the equipment; technical support protects the continuity of the classroom. And when you are buying dozens of displays, that difference matters a great deal.

Managing forty displays is not the same as managing two

When a school has one or two displays, many tasks can be dealt with by physically going into each classroom. With forty, fifty or more devices spread across several floors or buildings, that approach stops being reasonable. You need to be able to see which devices are connected, apply certain settings, schedule actions, group them by phase of education or by building and update them without going round the school display by display.

iiyama's answer to this is iiControl, a management platform for monitoring the status of devices, running scheduled commands and carrying out batch updates from a single console.

Central management makes even more sense when the refresh is carried out in phases. It is common for a school to replace ten classrooms one year, another fifteen the next and complete the roll-out later. Sticking to a consistent product line avoids ending up with multiple different models, systems and procedures that the IT lead then has to know and maintain.

What to put on the table before signing

None of these questions requires technical knowledge, and all of them have a documented answer. A supplier who answers them with the manufacturer's data sheet in front of them is offering one specific thing; one who answers with adjectives is offering something else.

• Size chosen for the actual distance to the back desk, in each type of classroom.
• Simultaneous touch and writing points, and which system each figure is obtained with.
• Glass thickness and hardness, anti-reflective treatment and type of lamination.
• Version of the built-in system, update schedule and OPS module option.
• Video inputs, USB-C with power delivery and compatibility with the school's accounts.
• Weight, VESA size, type of mount and height of the lower edge for the phase of education using the classroom.
• Power socket and network point at the planned location, or a budget line to install them.
• Years of warranty, on-site or workshop repair, and the committed response time.

How we approach a display refresh at PenwinEdu

At PenwinEdu we prefer to start with the school, not the catalogue. Before preparing a proposal we review the classrooms, their dimensions and viewing distances; what equipment is currently in place; how teachers connect; which platforms the school uses; which operating systems are on the laptops and what specific needs each phase of education may have. We also check the physical installation, the mounts, the power supply and the network cabling before assessing the complete solution.

From there we can define the right sizes, models, mounts and accessories and, when the refresh affects many classrooms, put forward a multi-year plan that allows the investment to be made gradually without ending up with a device fleet that is hard to maintain. Training is also part of that project, tailored to each stage, because a display with a lot of potential adds little if teachers end up using it exactly as they used the projector it replaces.

We usually work with iiyama interactive displays because their education range allows us to cover different sizes and classroom needs, but our role is not limited to supplying the equipment. We take care of planning the project, installation, configuration, training and ongoing support. Our technical support team handles issues with a committed response time of under four working hours.

A display is bought once, but used every day for years

The difference between two interactive display proposals is not just in the price, or in both listing 4K and Android on the data sheet. It lies in the size being right for the classroom, in teachers and pupils being able to write comfortably, in the system still being supported in a few years' time, in the teacher being able to connect without wasting time and, when a fault occurs, in there being someone responsible for getting the classroom working again.