The current study used principles of high-quality measurement design including domain specification, item generation, expert review, and piloting to develop two versions of a morphological awareness measure to be administered to 63 primarily English-speaking second grade students: the "Static Morphological Awareness Assessment (StMA)" and the "Dynamic Assessment of Morphology for Elementary Students (DAMES)." These experimental measures were administered alongside a modifiability scale and existing measures of morphological awareness, word reading and reading comprehension to 63 students the summer after their second-grade year. Distributional characteristics of all morphological awareness measures were explored. Results indicate the experimental StMA and DAMES exhibited ceiling effects, whereas an existing measure of morphological awareness did not. Correlations between all study measures were calculated. Positive, significant correlations between the measures demonstrated evidence of concurrent criterion validity. Internal consistency calculations supported acceptable or near-acceptable measurement reliability for all morphological awareness measures. Linear regression analyses did not demonstrate a significant benefit to administering the DAMES over the StMA nor to administering the modifiability scale alongside the DAMES.As more morphological assessment tools are critically needed by educators, the initial evidence of validity and reliability of the StMA and DAMES is promising. Due to their notable ceiling effects, these measures may be best used to determine mastery of early morphological awareness skills at a critical time in morphological awareness development. Future work should investigate their use with students with less developed language skills, such as younger students or those with developmental language disorder (DLD), and students who are acquiring two or more languages. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]