Fun letter and number practice with toy dump trucks. Just paint your letters and numbers on some rocks... I used several different kinds to grab a little use for science as well. Grab a couple of toy dump trucks... I found mine in the sand toy section for under $5. Allow students to explore at first and then use these differentiated activities to fit the needs of your young students. ... later you could even use the rocks for some cvc word practice, although I have not made any recording sheets for that yet. You could also use your materials in STEM activities... weighing the different trucks with their loads to see which ones weigh more... and how you could change the outcomes.
It's just fun practice for what your students need to know... I see this as a pre-k or beginning of the year kindergarten center activity.Later you could get students to match the letters to phonic picture cards... idea..(not included).