October 1, 2026 · 7 min read

Send Class Handouts Every Student Can Actually Open

Handouts that bounce off the school portal or won't open on a phone. How to prepare a lesson PDF the whole class can download, read and print.

You built a good handout. Then the virtual learning environment refuses it at 24 MB, two students say the link does nothing, one opens it on a phone and gets a wall of grey, and someone prints it and the diagram comes out as a black rectangle. None of that is a teaching problem — it's a file problem, and it's worth solving once because you'll do it every week for years.

Why a two-page worksheet ends up at 24 MB

• Images pasted straight from a phone or a camera, at full resolution, displayed at the size of a postage stamp.
• A scan of a textbook page or a worksheet, which is a photograph of paper rather than text.
• Screenshots saved as PNG — fine for a screenshot of a graph, terrible for a screenshot of a photo.
• A slide deck exported to PDF with a full-bleed background image repeated on all 30 slides.
• Several PDFs merged, each bringing its own embedded fonts and overhead.

Design for the worst device in the room

Someone in every class is on an old phone, a shared family laptop, a metered data plan, or a library computer that won't install anything. That's the device to build for, and it mostly means fewer, smaller, plainer files.

• One PDF, not a zip of five things. Zips are a genuine obstacle on phones.
• Keep text as text. A PDF exported from Word is small, searchable, readable by a screen reader, and reflows better than a picture of a page.
• Put the essentials in the first page, so a slow download is still useful when it stalls.
• Say in the filename what it is and when: plain letters, numbers and hyphens, no accents or spaces.
• If something must be printable, test one page on a real printer before you send 30 students to the library.

Shrink the images, not the document

Almost every oversized handout is an image problem. Before you reach for a PDF compressor, resize the pictures you're placing: around 1500 pixels on the long edge is more than enough for anything that occupies half a page on screen or in print. Do that and the PDF often comes out small enough that there's nothing left to compress.

If the PDF is still over the limit

Here the choice matters, and it's worth being blunt about it. A lossless re-save keeps your text exactly as text and usually saves a little. Rasterising — which is what any big reduction on a PDF actually does — turns each page into an image, and that costs you selectable text, screen-reader access and crispness. In Skrubly's compressor that's the difference between Light (lossless, text intact) and Balanced or Strong, which re-render the pages at roughly 120 and 96 DPI.

• A worksheet students will read, search or have read aloud to them: stay on the lossless option and cut content or images instead.
• A scanned reading extract that was already an image: rasterising is a fair trade, but zoom to 100 percent and check the smallest print afterwards.
• Still too big: split it. Portals that refuse 12 MB in one file usually take three files of 4 MB.

Check what you're handing out, not just its size

Documents carry an author name, a title field and the name of the software that made them — frequently a colleague's name if you inherited the template, sometimes a school's internal file path. Photos you took in the classroom can carry GPS coordinates and the exact timestamp. For a handout going to 120 families and possibly onwards to a group chat, that's worth 30 seconds of attention.

• Clear the author, title and producer fields on any PDF you distribute.
• Strip EXIF from photos you took yourself before placing them.
• Avoid photographs where students are identifiable unless you have permission on file. Crop or use a diagram instead.
• Check the tracked changes and comments are really gone, not just hidden.

A routine that holds up over a term

• Keep a folder of already-resized images you reuse, so you only shrink each one once.
• Set a size budget — if a handout goes over about 3 MB, something in it is wrong.
• Export, then open the export. Always. Checking takes ten seconds and catches a missing font or a rotated page.
• Keep the editable original. You will want to fix a typo next year.
• Upload a day early. Portals are slowest exactly when a whole year group needs them.