This study examined technical characteristics of slopes produced from two general outcome measures (GOMs)--the Naming Spelling and the Dictating Spelling tests. A total of 305 first-graders in Taiwan participated in the study and underwent weekly assessments for 6 weeks. Six alternate forms were developed for each of the two measures to monitor young students' learning progress of Zhu Yin Fu Hao (ZYFH). Technical characteristics of the two measures were examined in terms of reliability, sensitivity, and criterion validity for assessing student growth. Results showed that the alternate-form reliability coefficients ranged from 0.88 to 0.94 (mean = 0.92) for the Naming Spelling test, and from 0.77 to 0.83 (mean = 0.80) for the Dictating Spelling test. Both tests demonstrated to be sensitive for monitoring student's learning progress by revealing a quadratic growth pattern and inter-individual differences in growth rates. The growth rates estimated from repeated Naming and Dictating Spelling tests were found to correlate with students' performance on the final exam of ZYFH for lower-performing students. Results support the use of these two GOMs tests as reliable, sensitive, and valid measures for monitoring first-graders' learning progress of ZYFH.