Making wooden dividers to store small items separately in drawers, or to fill them with yogurt cups to sort screws or other small workshop pieces may seem like a simple task, but achieving all those joints fitting and aligning without first planning the correct approach will be impossible.
Matthias uses his dado blade set to cut the width of the slots at once, but if we have a sliding carriage on our table saw, since the slots are not very wide, we can cut them in several passes. The trick here is to cut all the slots in the same position at once.
The process is very well shown in the video, joining the slats with painter’s tape so they don’t move while cutting them all together. The result is that even if a mistake is made, it will always be to one side or the other on all the slats, and therefore, when fitting the slat that goes into the slots in that position, it will find the slots perfectly aligned and won’t need to bend to adapt to cutting errors (since if there are errors, they are all on the same side and are exactly the same magnitude).
You will find the link to the article in Spanish about these dividers for sorting from Woodgears in the woodworking projects tab of this blog, and there go to Woodgears translations (number 27).