Many people use exit slips at the end of class as a formative assessment to see what students have learned. I do this as well--but not as often as I use ENTRANCE slips!
Entrance slips you ask? Absolutely!
Consider the number of students you have had in your life who got 100% on every spelling test but spell the same words incorrectly at every other time. The same can be true with exit slips. LOTS of students can do well with a topic immediately after being taught. For me, it is more valuable to see who can still do it the next day or the day after that! That's why I started using quick learning checks the next day--I wanted to see where my class stood before I started to teach.
They can be used to check understanding on academic content OR to get a read on student attitudes and comfort levels and I use them in a couple of ways:
...to see if there are any students with major misconceptions
...to see if the entire class is missing understanding and I need to reteach
...to sort my students into groups for instruction
NOTE: A full blog post can be found here!
This "FREEBIE" gives you three sample entrance slips and ties directly to the blog post linked about explaining it in more detail. The full, paid resource is available by CLICKING RIGHT HERE!