Social and Emotional	Is shy or nervous with strangers Cries when mom or dad leaves Has favorite things and people Shows fear in some situations Hands you a book when he wants to hear a story Repeats sounds or actions to get attention Puts out arm or leg to help with dressing Plays games such as “peek-a-boo” and “pat-a-cake”
Language/Communication	Responds to simple spoken requests Uses simple gestures, like shaking head “no” or waving “bye-bye” Makes sounds with changes in tone (sounds more like speech) Says “mama” and “dada” and exclamations like “uh-oh!” Tries to say words you say
Cognitive (learning, thinking, problem-solving)	Explores things in different ways, like shaking, banging, throwing Finds hidden things easily Looks at the right picture or thing when it’s named Copies gestures Starts to use things correctly; for example, drinks from a cup, brushes hair Bangs two things together Puts things in a container, takes things out of a container Lets things go without help Pokes with index (pointer) finger Follows simple directions like “pick up the toy”
Movement/Physical Development	Gets to a sitting position without help Pulls up to stand, walks holding on to furniture (“cruising”) May take a few steps without holding on May stand alone
Causes for Concern	Doesn’t crawl Can’t stand when supported Doesn’t search for things that she sees you hide Doesn’t say single words like “mama” or “dada” Doesn’t learn gestures like waving or shaking head Doesn’t point to things Loses skills he once had
Developmental Checklists	12 Month Old Checklist (English) 12 Month Old Checklist (Spanish)